Clayton Industries Corporate Brochure

Flue Gas Recirculation

Clayton’s Flue Gas Recirculation (FGR) system is an effective method for re- ducing the NOx levels in flue gas emis- sions. Two primary factors contribute to the production of NOx when fuel is burned, combustion temperature and oxygen. By recirculating a portion of the flue gas into the combustion cham- ber, the combustion temperature and oxygen levels are effectively reduced - by as much as 60%. The flue gas is drawn from the ex- haust stack into the forced draft blower through an induction process that uses air velocity to create a vacuum. The vacuum changes in proportion to the combustion air rate change, causing a self regulating effect on the FGR rate, relative to the combustion air rate. Ef- fective NOx reduction typically requires 15-20% flue gas recirculation. The system is automatically controlled and is capable of a nominal 4:1 turn- down ratio. The Clayton flue gas recirculation sys- tem is available for use on natural gas, propane gas and #2 fuel oil in sizes from 150 BHP to 750 BHP. Typical emissions on gas are below 30 ppm NOx and 100 ppm CO. Typical emissions on #2 fuel oil are below 90 ppm NOx and 400 ppm CO. Both cor- rected to 3% O2

Clayton Industries, 17477 Hurley St., City of Industry, CA 91744 ,Tel: 800-423-4585, Fax: 626-435-0180 Email: sales@claytonindustries.com, Web: www.claytonindustries.com